To escape the U-Stor-It in The hundred Hands of Chaos in South Park: The Fractured But Whole go up to the keypad and enter the numbers. In the garage enter investigation mode and highlight the pipe nozzle and select the nozzle icon. Go to the highlighted area and follow the button prompts. Throw Snap N Pops at the box of fireworks:

Throw Snap N Pops at the fireworks.

After the fight highlight the lava at the bottom of the ladder and select the nozzle icon:

Highlight the lava and select the nozzle icon.

Go up to the highlighted area and follow the button prompts. Go up the ladder and talk to your buddy.